If mom is failing to abide by the court's visitation order, dad needs to file a motion for contempt and enforcement. Dogs are only relevent if the COURT deems them relevent. But the courts can't and won't do anything about the situation until the case is brought before a judge, and that's going to require bringing a motion before the court.
Indiana even has handy dandy packets available for those persons who want to attempt to bring such a motion themeselves, you can find it at:
http://www.in.gov/judiciary/selfserv.../contempt.html
The website also has guides to the various local rules of court by county, and those should be required reading for anyone wanting to appear before the court without representation.
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While pointers can be helpful, ultimately the number one lesson in any legal action is: don't take legal advice from books, family, friends, co-workers, police officers, grocery clerks, web sites, or people on legal message boards. The only person who can give YOU legal advice is YOUR attorney.
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