Sigh. I would also suggest you need to know the facts about the responsibilities of breeding and responsibility toward a breed which I'd hoped had come across from the many discussions around this topic, including on threads you have posted to.
1) there are no dog birth control pills that a dog can be put on until breeding is convenient for you and alternatives are expensive
2) they need to be totally isolated -- which includes not being allowed unsupervised into the garden, and not taken out for walks -- for the full 4 weeks that they will come into heat every six months
3) please read the post on the health risks to unspayed females, which have a 1 in 4 risk of cancer and high risk over their lifetime of pyometra, which *usually kills*:
http://www.cavaliertalk.com/phpBB2/viewtopic.php?t=2194
4) you need top have a committed show breeder evaluate your bitch and you must have a full and detailed 5 generation pedigree before you even consider the prospect of breeding, if you care at all about either the breed or the health of the puppies. Cockers, like cavaliers, are a health risk breed that has been seriously damaged by backyard breeders -- and solid colours, especially reds, are at serious risk of 'cascade of rage' syndrome. Their problems include temperament, eye, hip and conformation defects. The parents should have had eye and hip clearances from board qualified specialists and so would any dogs being bred. You would need to know the dog's pedigree history on these issues as well, and also for evaluating temperament and conformation.
Please read
http://www.cavaliertalk.com/phpBB2/viewtopic.php?t=2758
before ever considering breeding ANY dog, mix or purebred.
If you breed a bitch without any regard for health, pedigree and expert knowledge from a show breeder on whether your bitch is worth breeding, then you simply join the ranks of backyard breeders, one of the lowest life forms in the dog breeding world and only barely above puppy farmers because they continue the spread of serious health issues in every breed by their indifferent-to-health breedings. Backyard breeders are a main cause of the continuation of problems like the temperament issues so well known now in cockers, MVD in cavaliers, urinary tract problems in dalmations, and cancers in boxers and GSDs.
I am sorry but I feel very strongly about this and am really sorry that all the health conversations on this board apparently haven't made an impression -- not least because you yourself acknowledged recently that both your pups were purchased from Buy&Sell breeders because you didn't find looking for a reputable breeder convenient to your busy schedule (which means both puppies are from backyard breeders or puppy farm brokers -- no reputable breeder would EVER use the Buy&Sell to offer their puppies in Ireland). They may be lovely dogs in personality but they will NOT be breeding or show quality. And are likely already at higher risk of health problems for both breeds -- therefore should not be bred.
Thread locked and I don't want the topic continued.