Was at the dog park the other day and a Akita jump my female Sheppard. I had to break it up while wearing a shoulder holster. Of course my 1911 butt came out of hiding from the jacket I was wearing. NOT a big thing, the owner of the other dog didn't say anything. Not sure though, if he didn't because I was carrying or just not sure if I was some kind of LOE or nut case.
At best you would be operating in a gray area. You could probably be charged with public disorderly conduct. Public disorderly conduct is an offense that is whatever the local jurisdiction says it is and means what ever the LEO arresting you wants it to mean. The maximum fine for public disorderly conduct is $1025 or thirdy days in jail.