We have 2 boxers. Twix started chemo last Wednesday and we were advised to not let him pee where our other boxer Kenya uses the grass. Friday night she got really sick and was throwing up, not eathing much and not drinking much. Same sort of thing on Saturday but only threw up once or twice. Sunday she was totally normal, normal energy, ate normal, drank normal, then yesterday is back to being tired, quiet, not eating or drinking and threw up twice. Could this be from her licking Twix's penis now and then and getting some of the toxins in her body or do you think it is something else inside her or a virus she has picked up?