That sounds like the simplest yet! That should do the trick and be the right price too with no measuring, best of all worlds!! Thanks!! Hopefully he won't catch on and recognise the bottle too quickly and start running from me...he can get a little slappy when he feels like it!
You're in a real predicament.....hmmmm, maybe you could mix the food half and half or change to another hairball formula food. Let him know YOU know what's best for him. Either season it with a little wet food or just give him nothing other than the formula that will help with the hairball problem. You are the boss, after all and he will not starve. You're doing it for his own good. I don't think vasoline would be a good option. i wonder if a little teaspoon of olive oil would hurt. Or maybe a little cod-liver-oil..yummy :)
All of my cats have always loved the petromalt gel and its been very effective. Mine don't care much for the hair ball treats and even when they do eat them, it does seem to do anything. Can you disguise the petromalt by mixing it with his food?