What is the ingredient of infacol?Brand names change, but if the active ingredient is simethicone (sp?)then it's okay to use. Other methods that help are gentlemassage of his belly and encouraging him to exercise. Thevibrations from car rides can help break up gas too, but I'm guessingyou took a car to the vets' and it didn't help much. Youcould try offering him a heat source- try putting dry rice in a cleansock, tying it, and microwaving it to make it comfortablywarm. Then put it next to him, but let him move away if hedoesn't want the warmth.
Pineapple juice is okay for fluids, but you may want to water it down alotand only give him a little. It's very sugary andcould cause an overgrowth of bacteria in his intestines. Iknowthat some sources recommend it forhairballs,which your vet saidBubbles didn't have,but you'll still need to watchthe sugar.
It's good that he's pooping a little. Hopefully there will bemore soon!