my bitch was mated 21 days ago from first tie and 19 days from second tie i have read in books and internet all the way i spoke to studd dog owner about it all too but  however much i thought i knew i now begin to think how much more there is too know i welcome any advice from people who are willing to advise me with there own exsperiences i thought it wasright to get a scan done at 28 days after mateing but have read a little later could be better what wouldyou recommend ? also she has white discharge that i belive is a gd sign she is pregnant also she has brownish nipples appearing she was off her food for a bout 3 days after mateing then resumed bk to eating normally drinking fine too she has become a little more by my side and more affectionate even if i take the rubbish out she is looking to make sure im comming bk so cute lol but all this aside still now sure as its un noticeable to know by just looking at her any advice anyone willing to offer me ?thanx

anyone have any advice to the best day ?

28 days is the average I think.  I have large breed dogs so not sure if the same applies but my vet is willing to scan at 23 days.  Managed last time to pick up heart beats on the scan at this stage too :)
I think some people like to wait longer as bitches can still reabsorb after this time. 
Good luck

My vet wants more than 30 days.

my  scanner likes to see them at 28-30 days from last mating for best results.

The scanner I like to use (now sadly about 200 miles from me) likes them at about 3.5 weeks (for the best chance of giving number of puppies as she sees them on the day) but know some other scanners say 4 weeks. Depends if you just want confirmation that she is pregnant or looking for some idea of numbers (bearing in mind other things can happen b/w scanning and giving birth so no guarantees that the number will stay the same).

completely understand what your saying i really wanted to have a scan done so i roughly know howmnay to exspect as she would if pregnant deliver this would help me beless ofa worry for me but have al;so read of some forums on here that alot of the scans can be wrong too what would you recommend scan or no scan as the vet says completeley up to me when i would like one done what woulkd you say to the changed in her do you think likelyb she could or ccouldnt have caught this time as am completely aware that some people bitchs dont catch ?

If you are unsure of the vets ability then I would say get one done at 5 weeks. Even I can regcognise them by then :)

I have only bred twice, last year and in 1998 but used the same scanner for both. I did it for my own of peace of mind as I am a terrible worrier lol. The scanner was so good she told me (accurate) numbers both times and told me with the first litter that they would come a couple of days early and they did.

thanx so much think i will have 2 done one at 30 days then another at 5 weeks to double check things xx