I have a 6 month old bull that has been eating well and has always been active. Now she is lethargic. Still eating, but has noticeably lost weight, ready to shed, but not really going at it. Does this sound like parasites? Would love some ideas. I've had bulls for years and never seen such. Even bulls that I've had who did have worms, never showed weight loss. Don't wanna lose my baby, het for white sides . . . .