I know his heart rate goes up after a seizure because I can feel it with my hands when I try to calm him down. I've been reading more about the methods you mentioned in one of your comments below and it feels like a "holter" is something that could help. I can't find any commercial solution though but I'll talk to the vet about it.
Yeah, EEG is much harder than pulse detection, myography, GSR, ECG, etc. because the electrical fields from the brain are weak compared to electrical noise in the environment.
It is not that big of a hassle to wear a Holter monitor for continuous ECG monitoring for a month (w/ only 3 electrodes compared to the usual 12 lead ECG you would get in the clinic) but ambulatory EEG is a bigger deal
In the lab we are able to see EEG waves when doing ABR in a non-electrically isolated environment pretty easily. I think that if the electrodes can be implanted under the skin next to the skull in a way that the animal wouldn't be trying to remove them all the time that some reasonable data can be gleaned and separated from intermittent environmental noise. We do use filters after all.
I know his heart rate goes up after a seizure because I can feel it with my hands when I try to calm him down. I've been reading more about the methods you mentioned in one of your comments below and it feels like a "holter" is something that could help. I can't find any commercial solution though but I'll talk to the vet about it.