My westie is 20 months old and I am going to look for a BF for her and planning to get her done when she 2 years old.

but I really don't know where to fine a dog  !!!!

are there any agency available in UK ?

thanks for helping~

Do you mean you are looking to breed from her? If so you are not looking for a bf....you need a stud. You will need to get her shown or assessed by an expert to assess her faults and will need to research her pedigree.You will also need to pay for her health tests to be done and be prepared for the costs of raising a litter....which can add up to thousands of £!!!! You must also be prepared for the worse...bitches can and do die in whelp.
It is not a case of throwing 2 dogs of the same breed togethter...we could all add to the huge number of poor breed examples already in existence bred by people with the intent of making money....and the huge number in rescue.If you want to breed pls do it properly!
Archer