I have had a few seizure experiences with basenjis. Two basenjis were just middle-aged in a friend's older home. They were in an environment that was musty/moldy. While some folks may have no issues living with a little musty or moldy smell, I am very sensitive and have significant reactions to even just a tiny amount. Over a period of two years, they showed neurological symptoms which increased to seizures that became more frequent during humid days. Each ended their life at a time when humidity was high with a seizure that couldn't even be stopped by the vet, who had suspected a neurological cancer. Their symptoms really seemed to be tied to warm, humid days, early in the season before AC was running to dry out the house. We didn't think of the humidity/mold connection until the second b had already died. The environment has now been corrected (dehumidifier as needed until it's time to run the AC...). No problems with other b's now.
One of my personal dogs had two 'frozen' seizures about a week apart. I couldn't figure out a trigger, though it may have been stress (we have a lot going on here). A year later, he had two grand mal seizures that lasted several minutes, the second longer than the first, just a day apart. I do think that it may have been stress-triggered, though I'm not sure if it was emotional or noise stress. We had a new foster b who had arrived here as a very angry, frustrated b boy, so frustrated when he arrived that the top of one of his paws was raw from where he had chewed it in his previous home. He was very loud and grating while expressing his angry emotions, more than any other foster we've had (and we've had a few really loud basenjis). I changed his space which made him settle more quietly and quickly (he turned into a really lovely, sweet b boy with perfect skin here and now delights his adopter). My guy didn't have another seizure.
I now keep 2mL of frankincense on hand just in case there is another seizure. I know of a few b owners who have used a drop of frankincense put in the ear by using a fingertip to stop a seizure within a few seconds. One of those b owners also used the frankincense to stop seizures that his child was having.
To avoid risks of dehydration, I soak dry kibble with at least an equal amount of hot water so that the hydration level is closer to 'real' meat. I had one foster b boy who would plug up because he didn't drink enough regularly. I was adding water before he plugged, but I wasn't adding that much and I wasn't waiting long enough to have all of the water soaked up into the kibble. Never had another problem with him once I started soaking the kibble more thoroughly.