Any advice. Bought a new piggie 4 weeks ago to accompany recently bereaved boar. He was quite young but seemed to be fine. Then he suddenly got weak, stopped eating and looked dreadful. Vet gave antibiotics. I thought he would die. Hand fed him with mushed up pig food. Now he is perky, but very wobbly. After handling will topple over on return to cage, or run in circles. Still not eating well. Is separated from older boar. He is not like a normal young pig. I've had a few.