PET42 guide
Picky eater or toothache?
A dog that leaves food but takes treats may have dental pain. Changes in eating deserve investigation before repeated food changes.

In this article
Straight to the topic
- When the dog eats selectively
- This can have various causes:
- Toothache: A common, underestimated trigger
- Possible signs of toothache:
- Wet food, treats etc. – why that can be deceptive
- When should we take a closer look?
- Medical Training: The key to early detection
- Don't change the food too quickly
- However, constant food changes can:
- Conclusion
- Proper feeding can also play a role
- Feeding that is not optimally coordinated can:
Why dog refusal to eat should be taken seriously
Does your dog suddenly eat less well, leave his food or only take treats? The word “picky” comes up quickly. But it's not always just a matter of preference or being spoilt. Changes in eating behaviour can be an important warning signal - especially for problems in the mouth.
Dogs often show pain very subtly. That's why it's worth taking a closer look before changing the food or putting the bowl away again without comment.
When the dog eats selectively
The following situation is typical:
- The normal food is ignored
- However, treats or very soft food are taken
- The dog otherwise appears “completely normal”
This can have various causes:
The last point in particular is often overlooked.
- genuine loss of interest in the food
- Stress or changed environment
- Gastrointestinal sensitivities
- Pain when chewing or swallowing
Toothache: A common, underestimated trigger
Dental problems are one of the most common causes of changed eating behaviour - especially in small dogs, older animals or dogs with known plaque.
Possible signs of toothache:
Important: Not every dog shows obvious pain. Many dogs continue to eat – just differently.
- Food is dropped or only chewed on one side
- the dog eats more slowly or more carefully
- hard components are avoided
- Increased smacking or swallowing
- Bad breath
- Sensitivity to touch in the mouth area
Wet food, treats etc. – why that can be deceptive
The fact that treats are still being eaten does not rule out toothache. On the contrary:
A dog with a toothache can appear “fussy” even though he is actually trying to avoid pain.
- Treats are usually softer or smaller
- they need to be chewed less
- they trigger positive emotions that briefly mask pain
When should we take a closer look?
You should pay attention if:
In these cases, it makes sense to have your dog’s teeth and mouth checked - first at home, then if there are any abnormalities, go to the vet.
- the behaviour is new or sudden
- your dog used to eat without any problems
- additional weight loss occurs
- your dog generally seems calmer or more irritable
Medical Training: The key to early detection
Medical training is extremely helpful so that dental check-ups are possible at all. Dogs that have learned:
can be checked at an early stage – without stress, without coercion. In this way, problems can often be identified before they have a major impact on eating behaviour.
- Allow touching the head
- to let the mouth open briefly
- to remain calm
Don't change the food too quickly
A common reflex is:
“Then he probably doesn’t like it anymore.”
However, constant food changes can:
It is better to clarify the cause rather than circumvent the symptoms.
- Put a strain on digestion
- Increase uncertainty
- mask the real problem
Conclusion
A dog that eats poorly is not automatically picky. Changes in eating behaviour can be an indication of toothache, inflammation or other problems - even if treats are still happily accepted.
Observation, calm checks, medical training and, if necessary, veterinary clarification are a more sustainable approach than constantly changing the bowl.
Proper feeding can also play a role
Not every change in eating behaviour has everything to do with taste. The amount of food, composition, consistency and tolerability influence how much and how easily a dog eats - especially if the teeth, mouth or digestion react sensitively.
Feeding that is not optimally coordinated can:
Especially if a dog only eats selectively or often leaves food untouched, it is worth not only looking at their behaviour, but also at their bowl.
- Increase pickiness
- Promote uncertainty when eating
- additional strain on digestion
- conceal real causes such as toothache
Advice tailored to your dog
Find the right food and portion size for your dog
Many unusual eating behaviours are not caused by a deficiency, but rather by food that is not optimally balanced.
PET42 creates an individual food recommendation, independent of manufacturers, based on your dog’s details, including the appropriate food quantity in grams.
Questionnaire, checkout and feeding advice are provided in German.




