#1 Have health issues ruled out.
A wide range of health issues have decreased appetite as a symptom and it's often one of the first signs to manifest. Also, dental issues including painful tooth decay, tooth infections, and/or loose teeth can be the reason that a Shih Tzu suddenly becomes picky about food. So, bringing your Shih Tzu to the vet should always be the first step. You won't want to be addressing this from a behavioral standpoint if something health-related is to blame.
#2 Be familiar with serving sizes.
The majority of the time, pet parents who are worried their Shih Tzu is refusing to eat full meals are wildly overestimating how much food their puppy or dog should be eating.
The Shih Tzu is small toy breed and therefore pups and adults require a small amount of food relative to both larger dogs and of course to what us humans consume. Though it varies depending on life stage (puppy vs adult), activity level, weight, and health status, most Shih Tzu dogs only need 1/2 to 2 cups of food per day (not per meal).
For instance, using Wellness Complete Health for Puppies as an example, a 5-pound 4-month old puppy only needs 7/8 of a cup per day (not per meal). Split into 3 meals, that is under 1/3 cup for each meal. That's not much and it's easy to assume that a pup is picky when in fact they are eating as expected.
To know the right serving size for your particular Shih Tzu, read the feeding instructions on the label; these are based on a combination of age and weight and are generally on point for most brands.
Tips:
Know how much your puppy or dog weighs; do not guess. And, when measuring out food, do not guess; use a measuring cup (for dry food, not liquid) or a small kitchen scale like the
GreaterGoods Digital Kitchen Food Scale
to measure out portions.
#3 Stick with a schedule.
Only puppies under 3 months old or those ordered by the vet to be free-fed should have food left out round-the-clock. For all others, a schedule of 3 meals per day is best. Several small
healthy snacks
can be given in between meals.
#4 Reassess the food that you are offering.
Moving forward, sticking to just one main kibble for meals is part of the remedy for a very finicky eater. So every bite counts and you'll want to feel confident that the food you offer is top-quality. This means a 4 or 5-star rated food that's 100% all natural (no synthetic preservatives and no artificial flavor enhancers or coloring dyes) with no by-products, high wheat counts, or fillers like corn.
If you are thinking about changing brands, there are a couple of stand-out options:
For a grain-free option:
Wellness CORE for Small Breeds.
This really cannot be beat. It is 100% grain-free, with a base of turkey and chicken, which is generally tolerated extremely well. It has optimum protein and fiber levels, is sized correctly for small dogs, and has all of the extras that you expect a top brand to have with zero synthetic preservatives or other additives you want to steer clear of.
For one with healthy-grains:
Wellness Complete Health for Small Breeds. This has a base of turkey and oatmeal, both which are generally very easy on the tummy. There is also salmon, a great source of omega-3. This also has no chemical preservatives, artificial additives, by-products, or fillers.
See also:
Shih Tzu Feeding Guidelines
for details regarding wet vs dry, grain vs grain-free, and other food-related tips including a list of recommended brands.
Or, you may want to consider home cooking:
This is a responsibility that not every pet parent wants to take on and that's completely understandable. It can be a bit time consuming and you'll have to purchase a daily multivitamin, in addition to all of the ingredients. But, in some cases, offering fresh,
homemade recipes for dogs
can be a method of pleasing the pickiest of eaters. It allows you the opportunity to fine-tune meals just to your Shih Tzu's liking. You can give your dog the base proteins that they like best and choose the types of veggies and fruits that they most enjoy.