How to help dog loss

This evening was a blur I got a text from dad saying their dog was dead. I called right away and heard my parents hysterically crying talking to eachother about ending their lives. Then my mom got on the phone told me their dog got hit and died and they don't want to live and she has to go now. So I drop everything and get in my truck to their home. All my siblings got the same phone calls. One sibling showed up at their home. Others were told not to come. I didn't ask to come I just did because that was scary. Find out their dog was hit by a farmer and died they tried to do cpr on him and he didn't make it. Parents are hysterical keep talking about dying. Their dog is a child to them and I totally respect their grief their loss of goodbye was stolen and the whole thing was traumatic. My mom isn't well both physically and mentally. She is physically paralyzed. Her losing this dog is another level of loss I can't imagine. Both parents are talking about taking their lives. My sibling that was there and me did everything to bring comfort like take paw prints. Dig a burial. I placed flowers. Parents were doing better by the time we left them. I'm just terrified of them getting lost in their grief. I am 20 weeks pregnant and high risk so can only do so much. My hands and feet are swollen from the stress of the night so I need to be cautious of my needs too. Is there anything anyone can recommend to be helpful? Siblings and I want to get them a memorial marker for the burial. I thought about stopping over tomorrow but it is a drive 2 hour round trip with two toddlers and my swollen feet doesn't seem smart. They live in the country so I can't do food delivery of any kind. I'm at a loss. I just can't fathom losing my parents over their dog.