If this was an external fecal ball she may need to move her bowels again. Being backed up can make her vomit.
You can see if some pepcid or tagamet will make her feel less nauseous. You can scroll down on these pages to find info on dose and cautions in using these meds
www.petplace.com/drug-library/cimetidine-hcl-tagamet/page1.aspx
www.petplace.com/drug-library/famotidine-pepcid/page1.aspx
Hope this helps you!
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