A. It would depend on how big is the part of the glove he ate. He may have passed it in the feces already.
Laxative is not necessary unless there are signs of constipation.
I would recommend to monitor for any sign as diarrhea, vomiting, inappetence, lethargy and abdominal discomfort and if you notice any then bring him to your veterinarian.
Unfortunately even radiographs are not very helpful to identifying ''soft'' foreign bodies, as some kind of materials do not show up on x rays.
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