Max is going to be a year old next month, and we've had him since March (got him from Boxer Rescue when he was six months old). At that time we fed him Pedigree, puppy food, and switched to adult food when he was 8 months. However, the past few weeks he hasn't been eating as much. Yesterday he didn't finish his breakfast until 6:30 p.m. Before he woofed down his food. Should I try switching brands or adding wet food with his dry?? Thanks in advance.