What does this phrase mean: "In full cry"?

[Mahmud]

Test No. incompl/inter-43 "A Crying Shame", question 10

There was a noisy crowd of about a dozen people in ......... cry chasing after the child who'd stolen an apple from the fruit market.

(a) strong
(b) full
(c) loud
(d) big

Test No. incompl/inter-43 "A Crying Shame", answer 10

There was a noisy crowd of about a dozen people in full cry chasing after the child who'd stolen an apple from the fruit market.

Correct answer: (b) full

Your answer was: n/a
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What does it mean?
full cry
Thanks
Mahmud

[Torsten]

It's an expression that describes an eager chase. It's said of hounds that have caught the scent, and give tongue together.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Strawberry girl]

[Mister Micawber]

.
Giving tongue in the case of dogs is barking or howling.
.
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Native English teacher at Mister Micawber's

[Zarinamo]

Iam sorry but I didn`t understand these explanations...
I need to understand the whole sentence...
Thank you very much indeed.