https://www.rover.com/blog/how-to-introduce-dogs/
http://www.naturaldogblog.com/blog/2007/09/dog-training-how-to-introduce-your-dog-to-another-dog-in-ten-easy-steps/
https://www.facebook.com/notes/love-em-like-lacie-adoptable-animals/tested-tips-for-successful-fostering-introducing-a-new-dog-to-your-home-plus-vis/361207987245934/
https://www.cesarsway.com/dog-training/socialization/a-new-member-of-the-pack
https://m.petmd.com/dog/training/evr_introducing_a_new_dog_to_a_resident_dog
