Baby Weight Worries? Here’s What to Check Before You Stress

Before we dive in, a gentle reminder:

While we’re experts in organic European baby formula, any concerns about your baby’s weight or health should always be discussed with your pediatrician. Babies grow at different rates, and sometimes what seems like a red flag isn’t a problem at all. But when something feels off, even just a little, getting professional advice is always the best first step.

That said, there are a few things you can look into on your own that might shed some light on what’s going on. And if you’re formula feeding, some of those things could be as simple as how the bottle is made.

Let’s walk through what might be happening:

Some babies just grow at their own pace

Every baby is unique. Some put on weight quickly; others grow more slowly — and both can be completely normal. Factors like genetics, birth weight, temperament, activity level, and even sleep patterns can all play a role in weight gain.

In many cases, slow weight gain doesn’t mean anything is wrong, necessarily. But if your pediatrician uses terms like “failure to thrive,” it simply means they’re noticing a pattern where your baby isn’t gaining as expected and is in a lower percentile compared to other babies of that age. This can be caused by a mix of things — environmental, medical, or even emotional — and is often more about observation than diagnosis. We know that the term “failure to thrive” is, well, harsh. It’s quite a loaded term that can seem harsh, when in reality it could just mean that your baby is a late bloomer. Try not to take it to heart!

Start by checking bottle prep

One of the most common, fixable reasons for slow weight gain is incorrect formula preparation.

Whether you’re mixing powdered formula or using ready to feed bottles, how you prepare a bottle matters. Too much water can dilute the calories your baby is getting — and too little could lead to dehydration or tummy troubles.

The easiest solution? Always follow the instructions on the packaging.

European formulas like HiPP or Holle can be printed in languages like German or Dutch, but don’t worry. At Zen Organic Formula, we provide clear English instructions on each product page so you can double-check anytime. If you want to double-check, Google Translate's camera feature is your best friend.

Still unsure? Feel free to reach out. We’re always happy to help guide you in the right direction.

Could it be a food intolerance?

Sometimes, digestive discomfort or food intolerances (especially milk protein allergies or sensitivities) can interfere with weight gain. If your baby seems extra gassy, irritable during or after feeds, has unusual stools, or shows signs of reflux, these could be gentle signs that something in the formula isn’t sitting quite right.

This doesn’t mean anything is wrong — just that a switch could help.

For babies who may be sensitive to cow’s milk, goat milk formula can sometimes be easier to digest. Brands like Nannycare and Jovie offer gentle alternatives that are still packed with essential nutrients. Always check with your pediatrician before making a switch, especially if symptoms go beyond just slow weight gain.

Not all formulas are created equal

Another thing to consider: the nutritional content of your formula. European formulas — particularly organic ones — often use whole milk fats and avoid unnecessary additives or sweeteners. These natural fats are more in line with what babies get from breast milk and can support healthy weight gain.

Kendamil, for instance, is known for its use of whole milk fats and naturally sourced ingredients from the UK’s Lake District. They don’t use palm oil or corn syrup, and prioritize real, nutritious dairy in their cow and goat milk formulas, as well as their porridges for when it’s time to start weaning. If you’re looking for something with a rich nutritional profile, this could be a helpful switch.

How much and how often?

Sometimes, babies just aren’t getting enough formula, especially if you’re trying to follow a strict feeding schedule, or if they’re showing hunger cues that are being missed.

Here’s a quick checklist to review:

• Is baby draining bottles quickly or still acting hungry afterward?
• Are feeds being stretched too far apart?
• Have there been any recent changes in appetite or sleep?

Remember, babies go through growth spurts, and their feeding needs can change quickly. Trust your instincts, and your baby’s signals.

When to call the pediatrician

While many causes of slow weight gain are often minor and are usually nothing to worry about, you should always speak to your pediatrician if you notice:

• A noticeable drop on the growth chart
• Ongoing feeding issues (refusing bottles, vomiting, etc.)
• Very few wet diapers
• Lethargy or reduced activity
• Any other symptoms that just don’t feel right

If your baby isn’t gaining weight as fast as you’d hoped, take a breath. There are many gentle reasons behind it, and in most cases, it’s nothing to panic over. From checking your formula prep to making thoughtful changes in the type of formula you use, there are often small adjustments that can make a big difference.

And remember, you’re not in this alone. At Zen Organic Formula, we’re here to support you with high-quality options, helpful resources, and a kind word when you need it. If you’re unsure about what formula might be best for your little one, why not try our Formula Finder quiz? In just one minute, you can get our top recommendations for organic formula that your baby is sure to love.