"Im not a huge fan of getting a rescue dog with young kids. You just dont know there background."
BOLLOCKS! ABSOLUTE AND UTTER BOLLOCKS!
Sorry but I'm really fed up with this damaging and frankly ignorant view. Uneducated opinion like this costs lives.
You may have been dealing with an irresponsible rescue, fifi. I don't deny they exist but they are IME by far in the minority and are quickly picked up on by responsible rescue, I can pronmise you. You may however have made the common mistake of confusing a pound with a rescue - did you know that Battersea, Manchester, Birmingham and Cheshire "Dogs Homes", to name a few, are in fact dog pounds, with no no-kill policy and in some cases limited support for owners?
You may equally have not done your homework about the breed - I'm an experienced owner of over 25 years, a dog fosterer and an independent rescuer and I personally wouldn't recommend a Springer to many people with young children and certainly not to novice owners either. Wouldn't care for one myself, come to that, as I know how demanding they can be.
There aren't many dogs out they who, without the correct training, cannot be taught to behave. Maybe you didn't have the skills to do it or didn't employ a suitable person to help you with the Springer you returned to "rescue".
Whichever it was, or whatever combination of those factors it was, what is certain is that your comments on rescue dogs condemn them to die because people will believe this crap about "you don't know their background", will go and buy a puppy (quite possibly from a backyard breeder, but that's another thread in itself). The rescue dog they might have adopted will therfore remain in the rescue, taking up a space which rescue could have offered to a pound dog or a unwanted family pet... and therefore, whether on the cold concrete pound floor or the private vets' surgery the dog which could have taken that rescue space instead is "put to sleep.". I use quotes because I hate the euphemism - healthy dogs are not sleeping they are dying, being killed in their thousands each year.
MANY of the dogs which come into rescue DO have a history and their background IS known. Many come from people who, like my estranged stepsister, don't want the dog because he gets mud and fur on their cream carpets - there was one such on MN a few months ago too, who made herself equally unpopular, it happens, it isn't a joke made up by sarky rescuers, honestly - some come from families who are splitting up, from people who have lost their homes and cannot take their dog with them to a rented flat, from those who are too poorly to cope or from idiots who suddenly decide that they cannot possibly cope with a dog and a baby/pregnancy/a toddler.
And even then we don't take their word for it! A reputable rescue will assess the dog for themselves, often in an experienced foster home. Then they will assess you, the potential owner and evaluate your suitability not just as a dog owner but as the owner of that particular dog. On top of that they will neuter, vaccinate, microchip, offer lifetime support and advice (some I know even have the dogs back while the owner goes on hols!) and commit to taking him back no matter how far ahead in the future if the owner cannot keep him under a genuine no-kill policy.
Even some rescue dogs which originally came from pounds can be included in this if they have spent a considerable time in a responsible rescue which interacts well with their dogs, particularly if they rope in a fosterer to assess the dog. One such is a Greyhound I know of - came from an Irish pound where he was due to be killed and allegedly dog aggressive and temperemental. He's a long term rescue case, been there for 6 yesrs to my knowledge. He lives in that rescue with a pack of dogs which never numbers less than a dozen and has recently spent some time in foster with a family with 2 boys aged 4 and 6. He's also my pal, a head on my lap as soon as I sit down and adored by my own children. But of course, he's a rescue dog, let's keep our children away because you just don't know the background. 
So, I'm sorry that it didn't work out for you. I'm even more sorry for the Springer, who appears to have been failed by the human race, like so many others.
But please don't go around announcing to all and sundry that a person shouldn't adopt a rescue dog because "you just don't know there [sic] background" because it is a fact that this is in very many cases entirely inaccurate and it costs lives.