@dagodingo My Dog started having Seizures when she was 12. You are describing what could be an 'Aura' which is an early indication that a Seizure will occur. Low Blood Sugar caused me to pass out on the Train to work. I think the best place to start is with what one of the very experienced B owners said about switching her feeding schedule. A small amount of Kibble at night and she should be very hungry in the morning. That is the best advice I have seen here regarding her feeding schedule.
My instinct is to take your now Senior Dog to another Vet for a second opinion. Fresh eyes make a difference. Do not worry about insulting your current Vet, Vets and MDs work for US. They are not Gods and should not be treated as such. Small Animal Vets are some of the worst price gougers I have ever come across! It is less expensive for me to have my 1200 lb Horses Vetted and that includes Vaccines. So please consider getting a second opinion from a new Vet.
Basenjis are more common in the US than they were when I got my girl in 1998. I was lucky because the Vet knew immediately what her Breed was because she had a personal interest in the so-called Ancient Breeds. I would contact the BCOA to find a Vet in your area that works with this Breed all the time. I also would not give her too many snacks like Biscuits etc. The grain causes inflammation in the body and that never helps.
Best of luck to you and I had to get a King Size Bed so my Dog could sleep with me without causing me to fall out of the Bed! When they stretch out sometimes it is laterally and when she did that I would fall out of the Bed!
They are hilarious little beings and as soon as my 14-year-old Death Row Rescue Cat passes I will get a relative of my Dog. Debra found her Breeder and another Breeder who breeds from the same lines. I am totally prepared for a new Pup. I would take a Rescue but because I reside in a Condo I only have the Park for outside time. I was told I needed a back yard with a 6 foot wooden fence! My little homewrecker did just fine without the yard or the Fence!
Best of luck to you!