Meyers, H. (2022, April 21). Dog pregnancy: Signs, care, and preparing for puppies. American Kennel Club. Retrieved June 23, 2022, from https://www.akc.org/expert-advice/dog-breeding/dog-pregnancy-care-prep/
Romaniak, A., & Croney, C. (2022). Prenatal stress and puppies: Implications for dog welfare in commercial-breeding kennels. Purdue University Extension Education Store. Retrieved January 2, 2023, from https://edustore.purdue.edu/item.asp?Item_Number=VA-35-W
Development stages. Wonder Puppy. (n.d.). Retrieved April 19, 2022, from https://www.wonder-puppy.com/development-stages
Your puppy’s development. Ultimate Puppy. (n.d.). Retrieved April 19, 2022, from https://ultimatepuppy.com/UPchart/
Lombardi, L. (2021, March 31). Fear, stress, and puppy brain development: What to know. Fear Free Happy Homes. Retrieved April 19, 2022, from https://www.fearfreehappyhomes.com/fear-stress-and-puppy-brain-development-what-to-know/