# Dog Food Calculator

## Havanese Feeding Calculator

    

Use this calculator to estimate how much food your Havanese may need each day based on age,
      weight, activity level, food type, and calorie density. It gives a practical starting point
      for planning meals for puppies, adults, and senior Havanese.

    
      
        
          Dog Age
          
            Select age
            2–4 months
            4–6 months
            6–12 months
            Adult (1–7 years)
            Senior (8+ years)
          
        

        
          Weight Unit
          
            Pounds
            Kilograms
          
        

        
          Current Weight
          
        

        
          Activity Level
          
            Select activity
            Low activity
            Normal activity
            High activity
          
        

        
          Food Type
          
            Select food type
            Dry food (kibble)
            Wet food
            Mixed feeding
          
        

        
          Calories Per Cup / Serving
          
          
            For kibble, enter calories per cup from the bag. For wet food, enter calories per can,
            tray, or container.
          
        

        
          Spayed / Neutered
          
            Yes
            No
          
        

        
          Weight Goal
          
            Maintain weight
            Gain weight
            Lose weight slightly
          
        
      

      
        Calculate Feeding Amount
        Reset Calculator
      
    

    

    
      

### Your Estimated Feeding Plan

      
        
          Daily Calories
          —
        

        
          Daily Food Amount
          —
        

        
          Meals Per Day
          —
        

        
          Amount Per Meal
          —
        
      

      

      
        This calculator provides general feeding estimates only and is not a substitute for veterinary advice.
        Actual calorie needs vary based on metabolism, health conditions, and the specific food used.
        Always check your dog food label and consult your veterinarian for personalized guidance.
      
    
  

  
    (function () {
      const form = document.getElementById("havaneseFeedingForm");
      const resetBtn = document.getElementById("resetBtn");
      const errorBox = document.getElementById("errorBox");
      const resultsBox = document.getElementById("results");

      const dailyCaloriesEl = document.getElementById("dailyCalories");
      const dailyFoodEl = document.getElementById("dailyFood");
      const mealsPerDayEl = document.getElementById("mealsPerDay");
      const perMealEl = document.getElementById("perMeal");
      const feedingNotesEl = document.getElementById("feedingNotes");

      function showError(message) {
        errorBox.textContent = message;
        errorBox.style.display = "block";
        resultsBox.style.display = "none";
      }

      function clearError() {
        errorBox.textContent = "";
        errorBox.style.display = "none";
      }

      function poundsFromInput(weight, unit) {
        return unit === "kg" ? weight * 2.20462 : weight;
      }

      function roundTo(value, decimals) {
        return Number(value.toFixed(decimals));
      }

      function getMealsPerDay(ageGroup) {
        if (ageGroup === "2-4") return 4;
        if (ageGroup === "4-6") return 3;
        if (ageGroup === "6-12") return 2;
        if (ageGroup === "adult") return 2;
        if (ageGroup === "senior") return 2;
        return 2;
      }

      function getBaseCaloriesPerLb(ageGroup, activity) {
        const table = {
          "2-4":   { low: 55, normal: 60, high: 65 },
          "4-6":   { low: 45, normal: 50, high: 55 },
          "6-12":  { low: 35, normal: 40, high: 45 },
          "adult": { low: 25, normal: 30, high: 35 },
          "senior":{ low: 22, normal: 26, high: 30 }
        };
        return table[ageGroup][activity];
      }

      function getLifeStageNote(ageGroup) {
        if (ageGroup === "2-4") {
          return "Young Havanese puppies usually do best with smaller, more frequent meals throughout the day.";
        }
        if (ageGroup === "4-6") {
          return "At this stage, many Havanese puppies still need multiple meals daily to support steady growth.";
        }
        if (ageGroup === "6-12") {
          return "Older puppies are often transitioning toward an adult-style feeding routine, but calorie needs can still be relatively high.";
        }
        if (ageGroup === "adult") {
          return "Most adult Havanese do well on a consistent 2-meal schedule, adjusted for body condition and activity.";
        }
        if (ageGroup === "senior") {
          return "Senior Havanese may need fewer calories unless they remain very active. Monitor body weight and appetite closely.";
        }
        return "";
      }

      function formatFoodAmount(foodType, dailyServings, perMealServings) {
        if (foodType === "dry") {
          return {
            daily: roundTo(dailyServings, 2) + " cups/day",
            meal: roundTo(perMealServings, 2) + " cups/meal"
          };
        }
        if (foodType === "wet") {
          return {
            daily: roundTo(dailyServings, 2) + " servings/day",
            meal: roundTo(perMealServings, 2) + " servings/meal"
          };
        }
        return {
          daily: roundTo(dailyServings, 2) + " total servings/day",
          meal: roundTo(perMealServings, 2) + " total servings/meal"
        };
      }

      form.addEventListener("submit", function (e) {
        e.preventDefault();
        clearError();

        const ageGroup = document.getElementById("ageGroup").value;
        const unit = document.getElementById("unit").value;
        const weight = parseFloat(document.getElementById("weight").value);
        const activity = document.getElementById("activity").value;
        const foodType = document.getElementById("foodType").value;
        const caloriesPerServing = parseFloat(document.getElementById("caloriesPerServing").value);
        const neutered = document.getElementById("neutered").value;
        const goal = document.getElementById("goal").value;

        if (!ageGroup || !activity || !foodType) {
          showError("Please complete all required dropdown fields.");
          return;
        }

        if (isNaN(weight) || weight <= 0) {
          showError("Please enter a valid current weight.");
          return;
        }

        if (isNaN(caloriesPerServing) || caloriesPerServing <= 0) {
          showError("Please enter a valid calories-per-cup or calories-per-serving number.");
          return;
        }

        const weightLb = poundsFromInput(weight, unit);

        if (weightLb  25) {
          showError("Please enter a realistic weight for a Havanese or Havanese puppy.");
          return;
        }

        let caloriesPerLb = getBaseCaloriesPerLb(ageGroup, activity);
        let estimatedCalories = weightLb * caloriesPerLb;

        if ((ageGroup === "adult" || ageGroup === "senior") && neutered === "yes") {
          estimatedCalories *= 0.95;
        }

        if (goal === "gain") {
          estimatedCalories *= 1.10;
        } else if (goal === "lose") {
          estimatedCalories *= 0.90;
        }

        estimatedCalories = Math.round(estimatedCalories);

        const mealsPerDay = getMealsPerDay(ageGroup);
        const dailyServings = estimatedCalories / caloriesPerServing;
        const perMealServings = dailyServings / mealsPerDay;

        const formatted = formatFoodAmount(foodType, dailyServings, perMealServings);

        let extraTip = "";
        if (goal === "lose") {
          extraTip = "Because you selected a slight weight-loss goal, portions are reduced modestly. Weight loss in small dogs should be monitored carefully.";
        } else if (goal === "gain") {
          extraTip = "Because you selected a weight-gain goal, calories are increased slightly. Monitor stool quality and body condition while increasing food.";
        } else {
          extraTip = "This estimate is designed to help maintain your dog’s current weight, assuming the current body condition is healthy.";
        }

        let treatTip = "Treats should usually stay under about 10% of daily calories. If you give extra treats, reduce meal portions slightly.";
        let breedTip = "Most adult Havanese fall in roughly the 7–13 pound range, but individual calorie needs can vary meaningfully.";

        dailyCaloriesEl.textContent = estimatedCalories + " kcal";
        dailyFoodEl.textContent = formatted.daily;
        mealsPerDayEl.textContent = mealsPerDay;
        perMealEl.textContent = formatted.meal;

        feedingNotesEl.innerHTML =
          "<strong>Feeding Tip: " + getLifeStageNote(ageGroup) +
          "<br><br><strong>Practical Note: " + extraTip +
          "<br><br><strong>Treat Guidance: " + treatTip +
          "<br><br><strong>Breed Context: " + breedTip;

        resultsBox.style.display = "block";
        resultsBox.scrollIntoView({ behavior: "smooth", block: "start" });
      });

      resetBtn.addEventListener("click", function () {
        form.reset();
        clearError();
        resultsBox.style.display = "none";
      });
    })();