These are possible B mixes at the Miami-Dade Animal Services and here are their Petharbor webpages:
5 month old brindle female-B/Terrier mix
7 year old tri female-B/Chi/Terrier mix
2 year old brindle male-B/Min Pin/Terrier mix
2 year old black female-B/Terrier/Lab mix-Shelter has her listed as Lab mix
All dogs at this shelter are urgent and can be euthanized at anytime. Please contact the shelter for information. I do not know if any of these dogs are still available.
There is a Facebook page for Urgent Dogs of Miami.