My redbone is the same way i feed him 4 pounds of feed a day and he will eat it all and i worm him 2 a month with safe guard enuff for 300 pound yearling and he wont gain no weight
might want to change wormers, May have a type of worm that the wormer doesnt get. Just because you use "wormer" doesnt mean its gonna kill the worms you have. Feeding 4 lbs a day to a dog is more than enough to put weight on him. Something else is going on.