Bonnie is scared of any sudden loud noises and she's only 3. She has been scared of guns, fireworks and especially motorbikes right from the start. Unfortunately, she won't eat anything (so unlike her) while in her anxious state so can't try Lescef's suggestion.
What did help last bonfire night was creating a den for her; I put big throws over the table so it was dark underneath then I put my slippers in there (treats didn't work so something with my scent on to comfort her), a comfortable blanket on the floor and she did spend a lot of time in her little den. She chose that over being with us so I presume the dark, enclosed space gave her some comfort and eased her anxiety a little. Bonnie was crate trained as a pup so I think it gave her the same comfort as the crate did when she was little. If Humbug was crate trained, maybe creating a den during the storms might comfort him too xx