Anyone bought used rig with musty smells or dog odors?

We bought a 6 month old rig that had been home to 2 mid sized dogs. The owner had it professionally cleaned but the smell was still very much there. We were not dog owners & let it be known that the smell was not to our liking.

We really liked the trailer & it was a rare model. Long story short the seller greatly reduced the price. We bought. Had it cleaned again then went on a deoderising campaigne & airing out eventually ridding the trailer of the doggy smell.