Millie is on Heat

[Kacee]

No  luck so far , had a labra doodle interested yesterday was too  tall missing important area by about 100mm

Don't let her out of your sight, dogs can come from miles away and size won't matter, they work it out.  At her age, especially if a first litter, she could have problems giving birth resulting in an expensive vet bill with possibly, if medical help is left too long, no live puppies.