Our one year old pug eats twice a day and poops 5 or 6 times a day, or more. Is this OK?

We rescued our pug a few months ago and have been trying IN VAIN to potty train her. Poor thing was kept outside most of the time before we got her and that may have something to do with her resistance to potty training. She is fed twice a day with the same food our 3 yr old pug eats. He has a very normal bathroom schedule, goes twice a day on his walks like clockwork. We keep potty pads in the laundry room for her to use when she decides to go before her walk and we have been able to monitor how many times she goes potty. She usually poops 5 or 6 average (not small) amounts on the pads and has been known to poop 2 or 3 times in ONE hour! During her walks she will sometimes poop but she usually just pees or sniffs. We've tried not giving her as long of opportunities to use her potty pads so she can get used to going only when we go outside but she'll just poop in her crate. She seems to be very healthy and at least she is going but I'm concerned about the amount. Is this normal?? Should we bite the $65 vet visit and take her for a check up? HELP!