PANR SHOW has acidophilus which is a bacteria that aids in digestion. I like that it has this bacteria, as not all of my chinchillas enjoy eating acidophilis in the pill/powder. It also has oils, which are good for making fur coats look better.
PANR Pro does not have acidophilus, nor does it have the oils. It instead is a higher-protein diet (by like 2%). This feed does have its uses. If you have a kit you have just separated from mother and it needs help putting the weight on, this would be a good feed. Also, for mothers that are expecting and/or lactating, this feed also helps them in both of those regards.
A high-protein diet however is not something you should continuously give your chinchilla. I believe it might lead to kidney problems (correct me if I'm wrong), so it's not good to always be feeding it to your animals. This is why most people will only bother with purchasing PANR Show. Using PANR Pro is not necessary, nor is it good as a long-term diet. (again, correct me if I'm wrong there plzkty)
When we have PANR Pro at the house, we mix it 50/50 with SHOW and give it to our kits and mothers. Both have served us well, and have caused our chinchillas to be fat, popcorny, and happy furballs. :clap1: