assistance dog
US /əˈsɪs.təns dɔːɡ/
UK /əˈsɪs.təns dɔːɡ/

1.
chien d'assistance, chien guide
a dog that has been specially trained to help a person with a disability
:
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An assistance dog can provide invaluable support to people with visual impairments.
Un chien d'assistance peut apporter un soutien inestimable aux personnes malvoyantes.
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The restaurant welcomed the customer and her assistance dog without hesitation.
Le restaurant a accueilli le client et son chien d'assistance sans hésitation.