Feed more veggies, less dry food, true or not I was told dry food usually puts weight on. I weigh all there food especially after Christmas when Kody decided to eat the Christmas cake (not the whole cake but a good half dozen mouthfulls)
my mother was not happy
the vet said he was a lucky boy because of the raisins and alcohol (I did immediately give both of them charcol tabs) ,then with Christmas left overs he was re named fat boy. Although the vet said he was perfectly fine and not over weight 14.5k. I did go back to measuring food they get 100g meat ( lamb/chicken/veal mince or chunks) plus a large spoonfull veg plus small handfull of quality dry food. chicken necks, lamb neck 1/3rd, (wings can be fatty so I avoid them) chicken frame, 4 x 4 greyhound bisc (with kelp). It usually works out to if bone with meat in morning then sardines and veg for tea, if 4 X4 then meat veg and bisc for tea, sometimes I'll put the dry food still measured into treatball for morning then tea would be meat and veg. It evens out to daily, dryfood, veg, meat, bone, all in different order as to whether I've remembered to get food out of the freezer. I also make my own training treats which is a meatloaf that consists of all plus some liver which is weighed as a meal replacement for club training nights so not to over feed when training. Fat boy is now not fat boy partly I think he just filled out or matured he is just 3.
