I don't know what lemon curd is either....However, with the erratic breathing, this makes it an emergency.....The shivering & not being able to sit still is classic for extreme pain!! Where? Only a Vet will be able to tell....
Please, do not wait any longer...Something is very wrong here & he's depending on you to get him the help he needs.....
Please, come back & let us know what you find out.....Good luck....
I don't even know what lemon curd is. He does not sound well and the shivering could be because he is in pain.
Yes, agree, you need to get him checked by a Vet.
I'm from Mexico, so I immediately think of insect bites, but if you live in a place where snow's on the ground now, I doubt that would be the cause. It sounds as if he's having little seizures. They could be due to getting into some poisonous substance (car antifreeze, a poisonous plant, some cleaning fluids). Or they could be due to a physiological or neurological problem which just appeared now, for an unknown reason. My Standard Poodle had the same thing and then developed epileptic seizures. I found out later that it was a brain tumor which, at his age, was no longer fixable. There are so many reasons for your dog's symptoms that only a qualified vet would be able to diagnose it properly. I know it's what everyone says on these forums, but I'll say it again: Take your dog to a vet NOW, please. I'm sure you wouldn't let your child carry on with these symptoms without seeing a doctor right away, so please do it for your dog. I wish you all the best. Hugs to you and your little beagle. And please let us know how you fared, okay?