What's with the dog eating the wall skin?

It is caused by the lack of trace elements.

Pet pica refers to things that pets can't eat as food at ordinary times, which are typically represented by biting paint, mud, shoes, hair, clothes and so on.

At present, many cases have confirmed that pet pica is mostly caused by the lack of trace elements.

Extended data:

Literally speaking, eating something that does not belong to the normal food category means that pets in this situation should pay attention. If you persist for a long time, it is easy to cause symptoms such as fading nose, rough fur, loss of appetite, anemia and nervousness.

So don't feel indifferent after this happens, it won't have much impact on pets, and you should supplement them with trace elements immediately.

For example, pets love to eat soil, because soil contains a small amount of trace elements, and it can't get enough elements from conventional food, so the status quo of eating soil appears.

Dogs sometimes eat grass, but they eat very little and occasionally spit it out. Dogs eat grass not to satisfy their hunger, but to clear their stomachs, mainly because of their unique gastrointestinal structure.

The dog's stomach is very big, accounting for about 2/3 of the abdominal cavity, but its intestines are very short, accounting for about13 of the abdominal cavity. Therefore, dogs basically use their stomachs to digest food and absorb nutrients. It is easy to digest meat food, and it is difficult to digest things with "tendons" such as leaves and grass. Although dogs are carnivores, they can eat vegetables and grains when they are in trouble.

References:

Pet pica-Baidu Encyclopedia