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I am sorry Maxi has this trouble.
Cats with crystals often become nauseated.
Give him one quarter of a ten mg pepcid a/c (famotidine). I usually add it to a tablespoon of baby food chicken with no onion or garlic Or canned cat food.Every 12 hours.
Remove all dry food and any wet with chunks, pieces or shreds.
Feed only smooth pate canned food or baby food.
If he gets dehydrated give him tuna water drained from the can.
To prevent hairballs:
Please let me know how he is doing .
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