Look at you again. You said seven months and 25 kilograms. If it's a bitch, it's almost 30 kilograms in seven months, if it's a male dog.
It is probably caused by calcium deficiency.
There is no obvious difference between dogs and people in supplementing calcium. Generally speaking, calcium supplement products used by people are also suitable for dogs, which can reduce the intake of foods with high vitamin A content such as liver and is also beneficial to calcium supplement.
I suggest you choose less expensive calcium carbonate and calcium lactate, and at the same time inject vitamin D3, take vitamin D2 and vitamin D3 tablets orally.
Of course, if conditions permit, you can also choose some imported brands of calcium for pets, because these products are still relatively professional.
That's calcium deficiency. Calcium supplementation as soon as possible. Dogs can grow up to 8 months or even 1 year, and there is still hope. Give dogs some dog food that pays more attention to calcium supplementation and bone mass, and also supplement calcium according to the above methods.