How are you having pregnancy confirmed?
I would not use an e-collar on a pregnant bitch. I would expect her hormones to be out of wack and I would not punish her for that. As for walking her, I agree with using a prong if you must.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC