I'm not sure if there is a connection or not - but Bubba seems to have a runny nose on just one side

It's not real wet or crusty - just open and wet looking. This seems to have started when he began eating a lot of zuccini. Does that have a lot of salt in it - or something that may cause this? I'm cutting down his eating of it - but he loves it

and I hate not letting him enjoy it. OR could it be something else - there is no sneezing associated with this. Should I call the vet - I'm a bit worried about it.