Goat milk doesn't seem to cure the constipation, but it keeps her hydrated and somewhat nourished when she wouldn't otherwise eat. Goat milk is easier for people to digest than cow milk, so I tried it with her. She also eats raw chicken liver, especially the blood, when she won't otherwise eat. So if your friend is not eating, maybe try that. You might also smear a little glucosamine paste onto the front foot. Mix some CoQ10 into it maybe, I think somewhere I saw 5mg was appropriate for a small cat, but check for yourself. If she tastes the medicine in her food she won't eat, but if it's smeared onto her paw she will lick it off.