Dog health problems

Just wanted to let everyone know about the problems we have been suffering with my dog, Billy, who is a cross border collie. He is getting on for 10 years old now and therefore is relatively old, so what I am about to unveil may may be down to old age.
Billy started suffering fits about 12 months ago and at first we put it down to age, but following a conversation with a colleague at work it was suggested that a certain ingredient in Bakers Complete food had been alleged to have contributed to dogs suffering from seizures.
We decided as an immediate measure that we would change his food, which seemed to have a small effect, but nothing noticeable as he continued to suffer from fitting, normally occurring once a week. He has since been provided with medication by the vet and I was wondering if anyone else had encountered similar problems ??

If so, could you please get in touch and drop me a comment and I will try my best to reply.