Hi Murphy's Mum
Don't know where you are coming from but there is one on the A43 between Juntion 15a M1 and Silverstone - village called Tiffield - Brickyard Kennels (I think).
And there is one on the A43 between Bicester and Silverstone - Syresham Brackley Hatch Kennels and Cattery. This one is more or less opposite the Green Man pub (just as a landmark

)
Never used either I am afraid, though.
Its a shame my Sam is such a grouch

or I would have offered to help to out